Just counted them, with last night's game, that was our 15th extra inning game (thru game 143). That's over 10% of our games thus far. Someone may want to double check me on this, but it appears we're 10-5 in those games.
Just found a chart that shows there are eight other teams that have had more extra games. We're tied with Toronto at 15. Atlanta's had 23 (14-9), some others at 20. Amazing.
http://espn.go.com/mlb/standings/_/type/expanded